when to adjust crank time

so i just installed a hornet 564t alarm/rs in my buddies 96 ram (he thinks it is a 97 but all the wires match a 96 on the tech sheet). he previously had a horney 553t alarm/rs installed in it but the brain broke on it and it was cheaper for me to order him a new one and install it than drive 1.5 hours to detroit to have it attempted to be warrentied out but it was 4-5 years old. so anyways. got it installed just connected all the wires to the oldwires. had to install a mercury switch and the tach as the previous installer never did that. anyways worked great after i installed it, now today i was with him and wanted to check it all out to make sure everything worked great and to adjust the shock sensor up. so i go to rs it and it cranks and doesnt start. it will crank for a split sencond probly 0.6 which if factory set. i guess it will start after 2 or 3 attempts. so after all that my question is do i have to adjust the crank time up to 0.8 or 1 or 1.2 to get it to start right? i was thinking about doing it today but weather was crappy so i thought i would ask before i do it. also installed the siren from the new one under the dash for fun.